You will need to break decades of propaganda ops pushing the idea that labor is equivalent to socialism/communism or at least attached to the forces of evil in some form or another, or that a union is an evil money stealing organization that the ruggedly individualist American should never submit to.
It will likely be easier to wait for the misinformed generations to simply die out than actually affect that sort of change.
Judging by your comment you and I absolutely do not agree on what is best for the future of our country. Progressive tax is important, corruption exists within all governments but the ‘both sides’ argument is a horrendously stupid take that ignores social and environmental policy, and the similarities between conservative and liberal fiscal policy exist because the Overton window has shifted way too far to the right (in America); to see truly leftist/liberal economic policy, we must shift the spectrum away from the conservative/right side.